That is how I make frittattas too. What brand of pan do you use. Mine last about 2 years and then the frittatta starts to stick and it becomes an annoying thing to make... I have the simple calphon now and it is not working out any more : (

I use All Clad, sometimes non-stick; sometimes not. The pans have to be super clean and well buttered or oiled. If your pan isn't working for you anymore, which happens, I would buy a new, regular frying pan. It's versatile. I don't like having pans that are only good for one kind of food preparation.